Semotiadil improves survival of rats with monocrotaline-induced pulmonary hypertension: comparison with diltiazem.
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| Abstract |
We compared the effects of semotiadil, a novel Ca2+ channel blocker, with those of diltiazem on survival and regression of right ventricular hypertrophy and media thickening of pulmonary arteries in a rat model of pulmonary hypertension. Pulmonary hypertension was induced by a single injection of monocrotaline (80 mg/kg). Four weeks later, after pulmonary hypertension was confirmed, oral administration of semotiadil (10, 30, or 100 mg/kg/day) or diltiazem (100 or 300 mg/kg/day) was initiated. The rats were observed for 3 weeks. Survival was significantly longer in the group that received semotiadil 100 mg/kg/day than in the groups treated with diltiazem 100 or 300 mg/kg/day. Media thickness and smooth muscle area in pulmonary arteries were significantly less in rats treated with semotiadil 100 mg/kg/day than in animals treated with diltiazem 100 mg/kg/day. The right ventricle to left ventricle mass ratio, right ventricular wall thickness, and right ventricular myocardial fiber diameter were equal in these two groups. Semotiadil 100 mg/kg/day improved the survival of rats, which responded with a significant regression of right ventricular hypertrophy and media thickening of pulmonary arteries in comparison with rats treated with diltiazem 100 or 300 mg/kg/day.
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| Authors | T Takahashi, T Kanda, S Imai, T Suzuki, I Kobayashi, K Murata |
| Journal | European journal of pharmacology (Eur J Pharmacol) Vol. 295 Issue 2-3 Pg. 229-34 (Jan 11 1996) ISSN: 0014-2999 [Print] Netherlands |
| PMID | 8720589 (Publication Type: Journal Article) |
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